| 时间 | 值 （亿美元） | 世界排名 |
|---|---|---|
| 2016 | 474.31 | 79 |
| 2015 | 456.28 | 83 |
| 2014 | 481.97 | 85 |
| 2013 | 443.33 | 91 |
| 2012 | 390.88 | 91 |
| 2011 | 338.79 | 91 |
| 2010 | 314.08 | 89 |
| 2009 | 285.74 | 89 |
| 2008 | 273.68 | 92 |
| 2007 | 215.02 | 95 |
| 2006 | 186.1 | 91 |
| 2005 | 169.3 | 89 |
| 2004 | 128.26 | 96 |
| 2003 | 116.59 | 92 |
| 2002 | 108.06 | 90 |
| 2001 | 103.84 | 89 |
| 2000 | 101.86 | 88 |
| 1999 | 96.98 | 90 |
| 1998 | 93.45 | 90 |
| 1997 | 76.84 | 94 |
| 1996 | 64.96 | 100 |
| 1995 | 52.55 | 104 |
| 1994 | 45.11 | 99 |
| 1993 | 42.58 | 103 |
| 1992 | 46.01 | 101 |
| 1991 | 49.57 | 98 |
| 1990 | 42.59 | 102 |
| 1989 | 44.2 | 87 |
| 1988 | 51 | 83 |